Blog · Performance & Optimization
Performance & Optimization
Practical guides to speed up your sites and apps and pass Core Web Vitals.
Code Splitting Guide 2026: Faster Loads with Dynamic Imports
How to split your JavaScript so users download only what they need — route-based splitting, dynamic import(), React.lazy, vendor chunks, prefetching and handling stale-deploy chunk errors — each with why and a code example.
Performance & OptimizationHow to Optimize CSS in 2026: 14 Techniques for Fast Styles
Practical CSS performance techniques — remove unused CSS, inline critical styles, GPU-composited animation, content-visibility, containment and font optimization — each with why it matters and a code example.
Performance & OptimizationHow to Optimize React Performance in 2026: 14 Techniques
Practical React performance techniques — the React Compiler, stable keys, list virtualization, useTransition/useDeferredValue, code splitting, Server Components and streaming SSR — each with why it matters and a code example.
Performance & OptimizationHow to Reduce JavaScript Bundle Size in 2026: 14 Ways
Cut your JavaScript bundle — measure with an analyzer, code-split by route, tree-shake, replace heavy dependencies, enable Brotli, set a realistic browserslist and enforce a budget in CI — each with why and a code example.
Performance & OptimizationHow to Speed Up JavaScript in 2026: 16 Performance Techniques
Make JavaScript fast — break up long tasks with scheduler.yield(), offload to Web Workers, avoid layout thrashing, debounce, use passive listeners and the right data structures — each with why it matters and a code example.
Performance & OptimizationImage Optimization Guide 2026: Faster Images, Better LCP
A complete guide to optimizing images — modern formats (AVIF/WebP), responsive srcset, preventing CLS, lazy loading vs the LCP image, compression, CDNs and placeholders — each with why and a code example.
Performance & OptimizationHow to Improve Core Web Vitals in 2026: LCP, INP & CLS
A practical guide to the three Core Web Vitals — what LCP, INP and CLS measure, the exact 2026 thresholds, and how to fix each one — with the reasoning and code for every technique.
Performance & OptimizationLazy Loading Best Practices 2026: Images, Components & Routes
How to lazy-load the right way — native image/iframe lazy loading, never deferring the LCP image, route and component splitting, IntersectionObserver, prefetch-on-intent and handling chunk errors — each with why and a code example.
Performance & OptimizationModern Web Performance Checklist 2026: 37 Wins
A complete, up-to-date web performance checklist for 2026 — measurement, loading and delivery, JavaScript, CSS, images and fonts, Core Web Vitals, caching and monitoring — 37 concrete, verified items grouped so you can work top to bottom.
Performance & OptimizationTree Shaking Guide 2026: Eliminate Dead Code from Bundles
How tree shaking works and how to make it actually work — ES modules, the sideEffects flag (and its CSS gotcha), avoiding barrel files, pure annotations and verifying with an analyzer — each with why and a code example.